Other Parts Discussed in Thread: MSP430F5510
Hello,
I'm working on a simple code witch make 8 AD conversions with DMA... The following code works fine with DMA0 and DMA1 but when I change to DMA2 the debugger stays on "__delay_cycles(5000)".
#include "msp430f5510.h"
unsigned int ADC_Result[8];
void main(void)
{
WDTCTL = WDTPW + WDTHOLD; // Stop WDT
// Configure ADC10 - pulse sample mode; TB0 trigger; rpt single channel
ADC10CTL0 = ADC10SHT_2 + ADC10ON; // 16ADCclks, ADC10 on
ADC10CTL1 = ADC10SHP + ADC10SHS_2 + ADC10CONSEQ_2; // sampling timer, TimerB0.0 trigger
// trigger, rpt single channel
ADC10CTL2 = ADC10RES; // 10-bits resolution
ADC10MCTL0 = ADC10SREF_0 + ADC10INCH_0; // Vcc, A0
// Configure DMA (ADC10IFG0 trigger)
DMACTL0 = DMA0TSEL_24; // ADC10IFG trigger
__data16_write_addr((unsigned short) &DMA0SA,(unsigned long) &ADC10MEM0);
// Source single address
__data16_write_addr((unsigned short) &DMA0DA,(unsigned long) &ADC_Result[0]);
// Destination array address
DMA0SZ = 8; // 8 conversions
DMA0CTL = DMADT_4 + DMADSTINCR_3 + DMAEN + DMAIE; // Rpt, inc dest, word access,
// enable interrupt after 8 conversions
// Configure Timer Trigger TB0.0
TB0CCR0 = 256-1; // TB0.0 Period
TB0CCTL0 = OUTMOD_4; // TBCCR0 toggle (ON period = ~7.8ms)
TB0CTL = TBSSEL_1 + MC_1 + TBCLR; // ACLK, up mode
while(1)
{
while (ADC10CTL1 & ADC10BUSY); // Wait if ADC10 core is active
ADC10CTL0 |= ADC10ENC; // Sampling and conversion ready
__bis_SR_register(CPUOFF + GIE); // Enter LPM3, enable interrupts
__delay_cycles(5000); // Delay between conversions
__no_operation(); // BREAKPOINT to check ADC_Result
}
}
#pragma vector=DMA_VECTOR
__interrupt void DMA0_ISR (void)
{
switch(__even_in_range(DMAIV,16))
{
case 0: break; // No interrupt
case 2: // DMA0IFG
__bic_SR_register_on_exit(CPUOFF);
break;
case 4: // DMA1IFG
__bic_SR_register_on_exit(CPUOFF);
break;
case 6: // DMA2IFG
__bic_SR_register_on_exit(CPUOFF); // exit LPM
break;
case 8: break; // Reserved
case 10: break; // Reserved
case 12: break; // Reserved
case 14: break; // Reserved
case 16: break; // Reserved
default: break;
}
}
When I change the "0" in the yellow expressions by a "1" the code works but not when I change by a "2"..... Any Idea??
Thanks in advance!
